EJB24050 - 50 Amp Circuit Breaker

EJB24050 - 50 Amp Circuit Breaker

The Square D EJB24050 is a 50 Amp, 2-pole E-Frame circuit breaker built for reliable branch circuit protection in compatible Square D NF panelboards. Whether you're replacing an existing breaker or maintaining a commercial electrical distribution system, this model delivers dependable protection against overloads and short circuits using a proven thermal-magnetic trip mechanism. Rated for 480Y/277 VAC applications and offering interrupting ratings up to 100 kA at applicable voltages, the EJB24050 is well suited for demanding commercial and industrial environments. It also accepts both copper and aluminum conductors, giving installers greater flexibility during installation and maintenance.

Key Features and Benefits

• 50 Amp, 2-pole E-Frame circuit breaker
• Bolt-on mounting for secure installation
• Compatible with Square D NF panelboards
• Thermal-magnetic trip unit protects against overloads and short circuits
• Built-in trip indicator makes troubleshooting faster
• Rated for systems up to 480Y/277 VAC
• Interrupting capacity up to 100 kA at applicable voltages
• Accepts copper and aluminum conductors
• HACR and HID rated for approved applications
• Supports compatible field-installable accessories

Technical Specifications

• Manufacturer: Square D
  
• Catalog Number: EJB24050
  
• Series: EDB / EGB / EJB 125A Frame
  
• Current Rating: 50 Amps
  
• Poles: 2
  
• Mounting Style: Bolt-On
  
• Maximum Voltage: 480Y/277 VAC
  
• Trip Unit: Thermal-Magnetic
  
• Protection: Overload and Short Circuit
  
• Trip Rating: 1800 A
  
• Holding Current: 630 A
  
• Interrupting Ratings:
  • 100 kA @ 120 VAC
  • 100 kA @ 120/240 VAC
  • 100 kA @ 240 VAC
  • 65 kA @ 277 VAC
  • 65 kA @ 480Y/277 VAC
• Wire Range:
  • Copper: AWG 14–2/0
  • Aluminum: AWG 12–2/0
• Dimensions:
  • Height: 5.66 in. H
  • Width: 1.96 in. W
  • Depth: 4.05 in. D
• Weight: 3 lbs.
  
• Operating Temperature: Up to 104°F (40°C)
  

Material Compliance and Certifications

The Square D EJB24050 is cULus Listed, TAA Compliant, HACR rated, and UL Listed for High Intensity Discharge (HID) applications. These certifications make it a suitable choice for installations that require compliance with recognized North American safety standards.

Where It Works Best

The EJB24050 is commonly installed in commercial buildings, schools, healthcare facilities, retail spaces, office buildings, and light industrial facilities that use compatible Square D NF panelboards. It's a practical choice for protecting lighting circuits, HVAC equipment, and general branch circuits where dependable overcurrent protection is essential.